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| Number | Title | Issue Date |
| 7896624 | Method of running a down hole rotary pump A method of running a down hole rotary pump using a top drive, sucker rod or any drive shaft from surface. A first step involves providing a gear box having an input end and an output end. The gear box is being capable of receiving an input of a first speed at the i... | 03/01/2011 |
| 7806670 | Protector for electrical submersible pumps A system and method is used to protect a motor of a submersible pumping system. A variety of motor protector features are provided to facilitate operation of the motor protector and submersible pumping system in multiple wellbore environments and applications. ... | 10/05/2010 |
| 7611338 | Tandem ESP motor interconnect vent An electrical submersible well pump assembly has upper and lower motors that are filled with oil. During installation in a well, the upper motor lowers into engagement with the lower motor. The drive shafts of the motors have splined ends that engage each other with... | 11/03/2009 |
| 7549849 | Tandem motors A pumping system including a first section and a second section. The first section includes a first housing having an axial bore formed therethrough and a protruding member formed on one end of the first housing, and a first shaft arranged within the axial bore of t... | 06/23/2009 |
| 7400074 | Combined low power oil filled submersible motor and its protector The present utility model relates to submersible motor and its protector. A shared assembling base is provided to support and fix one end of the housing of the submersible motor and protector, the submersible motor has a main shaft to connect through the protector. ... | 07/15/2008 |
| 7370697 | Thrust section wear preventor A thrust section for use above a motor preferably includes a housing, a thrust shaft, a thrust runner connected to the thrust shaft, a thrust bearing connected to the housing, and a motor lead guard. The motor is preferably positioned above a pump assembly. The thru... | 05/13/2008 |
| 7367400 | Motor protector and method for chemical protection of same A chamber for use in a submersible pump assembly. The submersible pump assembly has a submersible motor which is connected to a power source and which will drive a submersible pump in the submersible pump assembly. A motor protector with expansion chamber is connect... | 05/06/2008 |
| 7217107 | Protector for electrical submersible pumps A system and method for protecting a motor for a submersible pumping system. A variety of motor protectors are provided for application in variable temperature environments and multiple wellbore orientations. The motor protectors may include one or more of a positiv... | 05/15/2007 |
| 7182584 | Motor protector A system and method is provided for reducing the wear on a motor protector, particularly when used in an abrasive environment. The motor protector comprises an outer housing having an internal shaft. The motor protector further comprises a head section having an abr... | 02/27/2007 |
| 7066248 | Bottom discharge seal section Disclosed is an electric submersible pumping system for use in wellbore. The electric submersible pumping system includes a motor assembly, a pump assembly and a seal section disposed in the wellbore. The pump assembly is below the motor and is driven by the motor. ... | 06/27/2006 |
| 6981853 | Protector for electrical submersible pumps A system and method for protecting a motor for a submersible pumping system. A variety of motor protectors are provided for application in variable temperature environments and multiple wellbore orientations. The motor protectors may include one or more of a positiv... | 01/03/2006 |
| 6889765 | Submersible well pumping system with improved flow switching mechanism The invention generally concerns a submersible well pumping system comprising an axially elongated housing and a multi-chamber hydraulically driven diaphragm pump suspended in a well. The pump is driven by a self-contained, closed hydraulic system, activated by an e... | 05/10/2005 |
| 6688860 | Protector for electrical submersible pumps A system and method for protecting a motor for a submersible pumping system. A variety of motor protectors are provided for application in variable temperature environments and multiple wellbore orientations. The motor protectors may include one or more o... | 02/10/2004 |
| 6666664 | Technique for protecting a submersible motor A motor protection system that utilizes a motor protector in combination with a submersible motor. The motor protector allows for the free flow of an internal lubricating liquid therethrough to the connected submersible motor. The internal liquid prevents... | 12/23/2003 |
| 6616425 | Feed device for a motor vehicle and reservoir for a feed device A feed device (1) for washer fluid, wherein an electric motor (3) which is provided for driving a feed pump (4) has a housing (6) which is sealed in the upper region and an opening (11) which is arranged in the lower region level with the feed pump (4). V... | 09/09/2003 |
| 6595280 | Submersible well pumping system with an improved hydraulically actuated switching mechanism The invention generally concerns a submersible well pumping system comprising an axially elongated housing having a diameter less than the bore hole of the well, a multi-chamber hydraulically driven diaphragm pump, suspended in the well. The pump is drive... | 07/22/2003 |
| 6498410 | Motor and pressure generating apparatus incorporating the motor A compact turbo-molecular pump having a high depressurizing capability. A motor driving the pump includes a rotary shaft, the distal and basal ends of which are supported by magnetic bearings. Each magnetic bearing has a rotated magnet, which is rotated i... | 12/24/2002 |
| 6307290 | Piston motor protector, and motor and pumping system incorporating the same A downhole pumping system includes a downhole pump that is coupled to a downhole motor. The downhole motor includes a motor protector that utilizes one or more retractable and extensible pistons, instead of an elastomeric bag, to accommodate motor oil con... | 10/23/2001 |
| 6242829 | Submersible pumping system utilizing a motor protector having a metal bellows A downhole pumping system includes a downhole pump that is coupled to a downhole motor. The downhole motor includes a motor protector that utilizes one or more retractable and extensible bellows, instead of an elastomeric bag, to accommodate motor oil con... | 06/05/2001 |
| 6059539 | Sub-sea pumping system and associated method including pressure compensating arrangement for cooling and lubricating A pressure compensator for a sub-sea pumping system for pumping an effluent from a deep-sea wellhead comprising a topside module, a sub-sea module, and an umbilical connection between the topside and sub-sea modules. Hydraulic fluid is circulated through ... | 05/09/2000 |
| 5478222 | Fluid pump having a pressure sealed motor chamber A pump of compact design, which is hermetically sealed to the outside and has no shaft lead-outs to the outside, includes a housing with an internal partition dividing the inside of the housing into a drive section and a pump section. A single shaft, whic... | 12/26/1995 |
| 5404061 | Oil-filled motor protector A motor oil-filled protector device for use with an electric submergible pump motor, includes a tubular extension to inhibit contaminated fluid from contacting an internal pressure relief valve. A motor oil pressure relief valve within the protector has a... | 04/04/1995 |
| 5367214 | Submersible motor protection apparatus A protective device for a fluid-filled submersible electric motor powering a downhole pump in a well bore disposed between the motor and pump and forming a sealed assembly with the motor is described. The upper interior portion of the device is sealed to ... | 11/22/1994 |
| 5046929 | Seal compressor A piston-type compressor includes a cylinder having a liner sleeve in which is mounted a reciprocating piston driven by a crankshaft through a connecting rod. The piston forms a dynamic seal with the sleeve with the volume above the piston head defining a... | 09/10/1991 |
| 4992689 | Modular protector apparatus for oil-filled submergible electric motors Modular protector apparatus for oil-filled submergible electric motors that drive submergible pumps comprises pluralities of components that are interconnected in different system permutations to form protectors appropriate for different applications. The... | 02/12/1991 |
| 4940911 | Submersible pump equalizer with multiple expanding chambers An equalizer is located either between a downhole submersible pump and the motor or between a gas separator and its motor. There are at least two, and preferably three, flexible concentric bags spaced about a hollow tube with the first bag nested inside t... | 07/10/1990 |
| 4932848 | Pump unit The invention relates to a pump unit comprising a liquid filled electric motor with a house and with a vertical driving shaft extending downwards, a pump comprising a pump house, and a pump portion which is connected with a driving shaft, and a chamber ar... | 06/12/1990 |
| 4906166 | Liquid coolant circulating system employing intergrated pump/accumulator An integrated pump and accumulator assembly for use in a system circulating a liquid coolant or the like. A housing defines a pump chamber and an integral closed accumulator chamber. A pump is disposed in the pump chamber and includes a coolant circulatin... | 03/06/1990 |
| 4751939 | Immersed hydraulic unit for controlling an underwater oil working station A reservoir (1) filled with fluid communicates through a central opening 21 with the inside of a flexible bladder 22 isolating the contents of the reservoir from the sea environment and equilizing the pressure inside the reservoir with the external hydros... | 06/21/1988 |
| 4583923 | Bellows latching mechanism for a submersible pump A pressure compensator for a submersible pump has features to prevent damage while lowering the pump into the well. The pressure compensator includes a bellows located below the pump. A retainer will mechanically retain the bellows in a position other tha... | 04/22/1986 |
| 4575315 | Device for providing fluid-tightness of a submersible motor and a motor incorporating said device A method for ensuring fluid-tightness is applicable to a submersible motor for operation under conditions of total and permanent immersion, especially in oil wells and geothermal boreholes. The emergent end of the drive shaft of the motor is fitted with a... | 03/11/1986 |
| 4558246 | Liquid-seal type motor having insulating oil pressure compensation A liquid-seal type motor comprising a cylindrical frame, a stator fixed inside the frame, a can placed at the inner circumferential side of the stator, a pair of end plates placed at both ends of and between the frame and the can to be sealingly connected... | 12/10/1985 |
| 4558247 | Liquid-seal type motor having insulating oil pressure compensation A liquid-seal type motor comprising a cylindrical frame, a stator fixed inside the frame, a can placed at the inner circumferential side of the stator, a pair of end plates placed at both ends of and between the frame and a can to be sealingly connected t... | 12/10/1985 |
| 4492523 | Toroidal inductor for a pressure sensor in a submersible pump A pressure compensator for a submersible pump has features to prevent damage while lowering the pump into the well. The pressure compensator includes a bellows located below the pump. A retainer will mechanically retain the bellows in a position other tha... | 01/08/1985 |
| 4477235 | Submerged motor-pump unit A motor-pump unit for submerging down a well, e.g. an oil well, comprises a motor portion driving a pump portion. The motor portion is filled with fluid to prevent ingress of the surrounding medium which the pump portion pumps. The fluid is maintained at ... | 10/16/1984 |
| 4462765 | Liquid-proofing system for an electric motor of a deep-well pumping unit A liquid-proofing system for an electric motor, having a casing divided by two partition walls into three coaxially arranged chambers--a top chamber, an intermediate chamber, and a bottom chamber. The partition walls have openings for establishing communi... | 07/31/1984 |
| 4436488 | Below motor pressure compensation system for submersible pump A submersible pump assembly has pressure compensator features to avoid negative pressure at the top of the tool during installation. The submersible pump assembly has an electric motor contained within a lubricant filled motor chamber below a pump. A pres... | 03/13/1984 |
| 4425087 | Pressure equalizing device and deep well motor/pump combination In a fluid-filled electric motor having a throughgoing shaft the requirements (i) internal fluid pressure maintained above ambient during installation (ii) equalization of internal and ambient pressures at run-up (iii) no solid particles contaminate inter... | 01/10/1984 |
| 4401413 | Air compressor switch device A switch device for an air compressor plant including an air receiver, an air compressor having an unloader valve mechanism, an electrical motor for driving the compressor, and an electrical supply circuit including a main line for energizing the motor an... | 08/30/1983 |
| 4324534 | Power supply apparatus Power supply apparatus having a two part housing, the first part containing a motor in a gas environment and the second part containing a pump in a pressurized fluid environment, the second part having an inlet and outlet for passage of pressurized fluid ... | 04/13/1982 |
